Kongl. Vet. Akad. Handl. Bd. XVIL N2 3 Tafl. Vv 
RSA TE 7 
Central-Tryckeriet, Stockholm 
1. Hydrochoreutes ungulatus C.L Koch. 2.H.cruciger C.L. Koch. 
3. H. filipes C.L Koch. 4 Hygrobates impressus Neum. 
